Galena oxidation mechanism

Soviet Mining - Tập 48 - Trang 354-362 - 2012
B. E. Goryachev1, A. A. Nikolaev1
1National University of Science and Technology “MISiS”, Moscow, Russia

Tóm tắt

The authors study the process of the oxidation of galena in the liquid phase of flotation pulp of alkaline pH in terms of the formal kinetics. Kinetic schemes of the process are considered. The theoretical kinetic parameters of the overall oxidation reactions of galena are defined as a result of calculations. The most probable rate-determining steps of the galena oxidation, as well as the equations of the rate of oxidizing the galena particles in the alkaline mineral suspensions, are found.

Tài liệu tham khảo

Kakovsky, I.A., Maksimov, A.V., and Saburov, L.V., “Oxidation of Some Sulphide of Copper-Zink Ores in the Presence of Pyrite,” Obog. Rud, 1979, no. 5. Kakovsky, I.A. and Kosikov, E.M., “Kinetics of Oxidation of Some Sulphide Minerals,” Obog. Rud, 1975, no. 3. Woodcock, J.T., “Some Aspects of the Oxidation of Sulphide Minerals in Aqueous Suspensions,” Proc. Austral. Inst. Mining and Met., 1961, no. 8. Strizhko, V.S., Goryachev, B.E., and Ulasyuk, S.M., “Main Kinetic Parameters of Electrochemical Galena Oxidation in Alkaline Solutions,” Izv. vuzov, Tsv. Metall., 1986, no. 6. Yushina, T.I., Flotatsionnye reagenty: ucheb. posobie. Ch. 1 (Handbook of Flotation Reagents. Part II), Moscow: MGGU, 2002. Avdokhin, V.M. and Abramov, A.A., Okislenie sul’fidnykh mineralov v protsesse obogashcheniya (Oxidation of Sulphide Minerals in Dressing), Moscow: Nedra, 1989. Abramov, A.A., Teoreticheskie osnovy optimizatsii selektivnoi flotatsii sul’fidnykh rud (Theory of Optimization of Selective Flotation of Sulphide Ores), Moscow: Nedra, 1978. Vigdergaus, V.E. and Kondrat’ev, S.A., “Role of Dixantogen in Froth Flotation,” Journal of Mining Science, 2009, vol. 45, no. 4, pp. 398–403. Goryachev, B.E., Nikolaev, A.A., and Lyakisheva, L.N., “Electrochemistry of Galena Oxidation as the Basis for Optimization of Agent Modes in Flotation of Polymetallic Ores,” Journal of Mining Science, 2010, vol. 46, no. 6, pp. 681–689. Goryachev, B.E., Nikolaev, A.A., and Lyakisheva, L.N., “Electrochemical Kinetics of Galena-Sulphydryl Collector Interaction as the Basis to Develop Ion Models of Sorption-Layer Formation on the Surface of Sulphide Minerals,” Journal of Mining Science, 2011, vol. 47, no. 3, pp. 382–389. Gerasimov, I.Ya, et al., Kurs fizicheskoi khimii (Physical Chemistry), Moscow: Khimiya, 1973, vol. 2. Chanturia, V.A. and Vigdergauz, V.E., Elektrokhimiya sul’fidov. Teoriya i praktika flotatsii (Electrochemistry of Sulfides. Theory and Practice of Flotation), Moscow: “Ruda Metally,” 2008. Latimer, W.M., The Oxidation States of the Elements and Their Potentials in Aqueous Solutions, New York: Prentice-Hall, 1952, p. 245.